-thionium
noun combining form 
(-s) 
Etymology: New Latin, from thi- + -onium 
 : onium compound containing sulfur and usually another element (as nitrogen) besides carbon in a ring 
< phenazathionium >
< phenazathionium >
| 词汇 | -thionium | 
| 词根词缀 | Webster -thionium < phenazathionium > | 
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